The harmonic contents of electronic device currents: experimental, qualitative and theoretical analysis

This paper examines the harmonic contents of input currents (ICs) of electronic devices (EDs), such as computers, power supplies, various measurement devices, etc. All types of EDs have similar nonsinusoidal wave form of the ICs. An explanation of the peculiarities of the device ICs is presented. Several criteria, which allow clustering the EDs in three groups are defined. For each group the distortion effects, caused by different EDs, are estimated.